ICS does use all that useless leftover ram to make things smoother.what's the sense of having all that hardware if your'e not gonna let the OS use it? :| seriously people don't buy stuff you don't understand.-_-.

What it shows in task manager is not so important, please look in Settings > Applications > Running Services, and on the lower part of the page it should show a green/grey bar where it says RAM: Used and free. Add them and please reply the result to see if available RAM has been indeed lowered.

In 2.3.6 it shows 208 used and 508 free (208+568 = 776 available RAM to the user.

Nirvana Rockstar, 29 May 2012after updating 2.3.6 it says i can't connect to kies. but then the OTA is also saying that no ... moreJust try using factory reset.(Backup your mobile before that using Kies via WiFi)

I've done this when I faced this issue. It wont reset the firmware, but erases all the user data from it.

JoNo7, 29 May 2012just updated my i9100G to ICS and my RAM has dropped from 910 to ~700. like WTF!?!? kits true buddy ! i have the same problem of reducing ram in my galaxy s2 i9100g.....wtf is there any solution to get back to ginger bread ....... ice cram sandwich look like curse to me . please reply me as soon as you can .